<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge;chrome=1">
        <meta name="author" content="test">
        <meta name="description" content="test">
        <meta name="copyright" content="ltlwill">
        <meta name="viewport" content="width=device-width;height=device-height;initial-scale=1.0">
        <title>下拉框</title>
        <style>
            .drop{
                width: 200px;
            }
        </style>
    </head>
    <body>
        <select class="drop">
            <option>111</option>
            <option>222</option>
            <option>333</option>
            <option>444</option>
            <option>555</option>

        </select>

    </body>

</html>